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HO AB Brake System Kit 3d printed A completed K.Kadwell AB brake system installed under a Tichy boxcar. (Please note: wires, chains, and boxcar/underframe are not included-- but the air brake components (incl. levers) are!)

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A completed K.Kadwell AB brake system installed under a Tichy boxcar. (Please note: wires, chains, and boxcar/underframe are not included-- but the air brake components (incl. levers) are!)
HO AB Brake System Kit 3d printed A completed K.Kadwell AB brake system installed under a Tichy boxcar.  (Please note: wires, chains, and boxcar/underframe are not included-- but the air brake components (incl. levers) are!)
HO AB Brake System Kit 3d printed A completed K.Kadwell AB brake system installed under a Tichy boxcar.  (Please note: wires, chains, and boxcar/underframe are not included-- but the air brake components (incl. levers) are!)

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HO AB Brake System Kit 3d printed This is the "d00" AB brake sprue (WITHOUT regulators).  There are enough parts for two cars.
HO AB Brake System Kit 3d printed This is the "d00" AB brake sprue (WITHOUT regulators).  There are enough parts for two cars.

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HO AB Brake System Kit 3d printed This is the "d10" AB brake sprue (WITH regulators).  There are enough parts for two cars.
HO AB Brake System Kit 3d printed This is the "d10" AB brake sprue (WITH regulators).  There are enough parts for two cars.

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HO AB Brake System Kit 3d printed The parts are protected in a cage-like sprue.  The best way to begin removing the parts is to cut the main sprue into its two halves.
HO AB Brake System Kit 3d printed The parts are protected in a cage-like sprue.  The best way to begin removing the parts is to cut the main sprue into its two halves.

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HO AB Brake System Kit 3d printed Next, cut the sprues next to each component.  Press your blade against a cutting surface whenever possible-- or use sprue clippers.
HO AB Brake System Kit 3d printed Next, cut the sprues next to each component.  Press your blade against a cutting surface whenever possible-- or use sprue clippers.

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HO AB Brake System Kit 3d printed This is a safe way to free the delicate AB valve from its sprue.  Watch out for the air filter!
HO AB Brake System Kit 3d printed This is a safe way to free the delicate AB valve from its sprue.  Watch out for the air filter!

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HO AB Brake System Kit 3d printed Note the thin sprue "gates" that aid in freeing the brake levers-- these can be used to index a blade.
HO AB Brake System Kit 3d printed Note the thin sprue "gates" that aid in freeing the brake levers-- these can be used to index a blade.

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HO AB Brake System Kit 3d printed The four brake components are shown freed to the left.  And look at all the cool scrap shapes that you get to the right-- a free bonus!
HO AB Brake System Kit 3d printed The four brake components are shown freed to the left.  And look at all the cool scrap shapes that you get to the right-- a free bonus!

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HO AB Brake System Kit 3d printed This is a safe way to handle the AB valve while working.  Again, watch out for the delicate details.
HO AB Brake System Kit 3d printed This is a safe way to handle the AB valve while working.  Again, watch out for the delicate details.

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HO AB Brake System Kit 3d printed You way wish to file off the little mounting pins.  A gently-applied sanding stick will do this quickly and easily.
HO AB Brake System Kit 3d printed You way wish to file off the little mounting pins.  A gently-applied sanding stick will do this quickly and easily.

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HO AB Brake System Kit 3d printed This is a Tichy boxcar underframe, prepped with some styrene stock shapes to create a typical AB brake mounting bracket layout.  Mounting locations did vary by prototype, so there is some freedom at this stage.
HO AB Brake System Kit 3d printed This is a Tichy boxcar underframe, prepped with some styrene stock shapes to create a typical AB brake mounting bracket layout.  Mounting locations did vary by prototype, so there is some freedom at this stage.

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HO AB Brake System Kit 3d printed Here is a suggested AB brake layout using a Tichy boxcar.  This photo, and those following, show the "d00" variation with no included regulator (a "d10" variation build is shown later in the photo section).
HO AB Brake System Kit 3d printed Here is a suggested AB brake layout using a Tichy boxcar.  This photo, and those following, show the "d00" variation with no included regulator (a "d10" variation build is shown later in the photo section).

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HO AB Brake System Kit 3d printed All wire pieces fit into pre-formed holes in the brake components.  No modifications have to be made to the Tichy parts, either.
HO AB Brake System Kit 3d printed All wire pieces fit into pre-formed holes in the brake components.  No modifications have to be made to the Tichy parts, either.

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HO AB Brake System Kit 3d printed Note the detail around the AB valve!  All of the valve ports have pre-formed holes for easy wire installation.
HO AB Brake System Kit 3d printed Note the detail around the AB valve!  All of the valve ports have pre-formed holes for easy wire installation.

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HO AB Brake System Kit 3d printed Another view of the AB valve.  Install as much or as little extra wire detail as you like!
HO AB Brake System Kit 3d printed Another view of the AB valve.  Install as much or as little extra wire detail as you like!

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HO AB Brake System Kit 3d printed This is a "cheat sheet" chart for those wishing to install piping into their AB valve.  The center port is often left unused in models (including the example photos shown here) but it is included anyway for those intrepid souls wishing to try it.
HO AB Brake System Kit 3d printed This is a "cheat sheet" chart for those wishing to install piping into their AB valve.  The center port is often left unused in models (including the example photos shown here) but it is included anyway for those intrepid souls wishing to try it.

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HO AB Brake System Kit 3d printed The brake cylinder features a pre-formed shackle that can accept scale-size chain.  If the shackle is cut off, there is also a hole hidden behind it for a direct rod connection, for those who'd prefer to install a handbrake rod that way.
HO AB Brake System Kit 3d printed The brake cylinder features a pre-formed shackle that can accept scale-size chain.  If the shackle is cut off, there is also a hole hidden behind it for a direct rod connection, for those who'd prefer to install a handbrake rod that way.

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HO AB Brake System Kit 3d printed From the side, the parts offer a very nice silhouette.
HO AB Brake System Kit 3d printed From the side, the parts offer a very nice silhouette.

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HO AB Brake System Kit 3d printed Another track-level view.
HO AB Brake System Kit 3d printed Another track-level view.

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HO AB Brake System Kit 3d printed Here is an older boxcar (perhaps Concor) being upgraded with a "d10" brake set-- note the included brake regulator at middle right.  Modeling work on this car done by Gary Wemyss.
HO AB Brake System Kit 3d printed Here is an older boxcar (perhaps Concor) being upgraded with a "d10" brake set-- note the included brake regulator at middle right.  Modeling work on this car done by Gary Wemyss.

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HO AB Brake System Kit 3d printed The same car, painted.  These are the "d10" brakes, which include a pre-installed brake regulator.
HO AB Brake System Kit 3d printed The same car, painted.  These are the "d10" brakes, which include a pre-installed brake regulator.

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HO AB Brake System Kit 3d printed Another use for K.Kadwell brakes-- replacing damaged parts, as was done with the missing air reservoir on this service-worn car.
HO AB Brake System Kit 3d printed Another use for K.Kadwell brakes-- replacing damaged parts, as was done with the missing air reservoir on this service-worn car.

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HO AB Brake System Kit 3d printed Once painted, it's better than new.
HO AB Brake System Kit 3d printed Once painted, it's better than new.

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HO AB Brake System Kit 3d printed Remember what we said about free scrap?
HO AB Brake System Kit 3d printed Remember what we said about free scrap?

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HO AB Brake System Kit 3d printed The quintesential railroad parts pile... (Roundhouse built by Gary Wemyss.)
HO AB Brake System Kit 3d printed The quintesential railroad parts pile... (Roundhouse built by Gary Wemyss.)

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HO AB Brake System Kit 3d printed Just another view of a finished and painted underframe.
HO AB Brake System Kit 3d printed Just another view of a finished and painted underframe.

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HO AB Brake System Kit 3d printed
HO AB Brake System Kit 3d printed

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HO AB Brake System Kit

$12.00
3D printed in matte translucent plastic that showcases incredibly fine and intricate details.
QTY
Product Description
This may not be the first AB air brake system offered in HO scale-- but it just may be the best!

BACKGROUND

The AB brake system replaced the earlier K brake system as the AAR standard design for American railroads in 1933, making it mandatory equipment on all cars built after that date.  By the early 1950s, AB brakes were required on all cars used in nation-wide interchange service.

THE KIT

These AB parts are not modeled after parts already produced by "the other guys"-- these parts are truly scale, modeled from prototype drawings, plans, and photographs.  The cylinder, reservoir, and infamously-complex AB valve are modeled with exacting scale fidelity-- you may be surprised to see how much better these parts look than those found included on high-end models!  But even the lowly brake levers, with their included hangers and rod hinges, are made to AAR-standard lengths and proportions.

Use these parts to bring your current R-T-R models up to a new standard, to repair damage, or to detail a kit or scratch-building project already under way!

Included in each product are TWO complete AB brake system underbody sets-- that is, enough parts to detail two cars!  The parts for each car include:

-AB valve with included air filter;
-Air reservoir;
-Brake cylinder with included piston rod, B-end brake lever, and lever hangers;
-A-end brake lever with included lever hangers and an OPTIONAL included brake regulator (see VARIATIONS).

These parts are designed to be not only incredibly realistic but also easy-to-use.  Because the brake levers and hangers are offered as pre-made assemblies, there is far less chance of fumbling with small parts compared to some other brake system kits-- and you can still "see through" them for an impressive side-view profile.  The AB valve has its scale air filter pre-installed, also helping to keep delicate work to a minimum.  All of the parts-- including the brake levers-- have pre-formed holes for the easy installation of wire pipes and brake rods as supplied by the modeler (0.012 or 0.0125 rodding is recommended).  The AB valve has holes in its back for all five of its prototypical ports-- including one in the air filter itself.  The B-end brake cylinder lever features a realistic printed clasp for the installation of a metal hook and handbrake chain, but it also features a hole behind that clasp for modelers interested in an even more secure attachment point.

INSTALLATION

All of the parts feature mounting pins.  The brake cylinder and AB valve feature pins that will fit into #76 drill holes.  The air reservoir and brake levers feature pins designed for #80 drill holes.  Because the cylinder and AB valve are mounted to their sprues via their pins, be careful not to trim off the pins by mistake when removing the sprues-- although if this does happen, both of these parts feature broad flat surfaces that are still easy to glue to.  Of course, all pins can also be cut off intentionally if it is desired to glue any particular component to a flat surface without using a pin hole.  Because brake-mounting brackets varied by prototype, styrene plastic may be needed to create new mounting brackets for these parts, depending on the HO car being used.

VARIATIONS

In the spirit of making our brake system as easy to use as possible, our brake kits come with the option of a pre-installed brake regulator.  Brake regulators were commonly found on all sorts of cars during the 1930s, '40s, and '50s and allowed a trainman to easily adjust or correct slack in a car's brake rigging.  Check if your prototype used them!  Although mounting positions did vary, our version comes mounted in a typical location at the end of the A-end brake lever.  To purchase our brake system WITH included regulators, choose the "d10" variation-- to purchase the system WITHOUT regulators, choose "d00."  That variation includes a traditional fixed mounting bracket for the A-end brake lever instead.

MISC. NOTES

-Because the brake levers and hangers are made to railroad industry standards, they will fit almost any center sill without modification-- we've tried them successfully on cars from many manufacturers (Tichy center sills run a bit narrower than most, but our brakes will still fit-- see photos above).  However, please note that our brake levers are not made to fit "fishbelly" center sills-- although they can be made to work with a bit of modification.

-Two complete air brake systems are included on a single sprue with each purchase.  The sprue forms a cage around all of the parts to protect them during shipping.  Care must be taken in cutting away the cage and removing parts from the sprues-- please separate one part at a time from the cage before removing the direct sprue connections.  See illustrations above.

-The AB valve and its attached air filter feature several delicate details!  To avoid unwanted damage, see photos above for recommended handling techniques for this part.  (We went a bit above and beyond with this valve, figuring that, even if damaged, one of our AB valves is still better than anyone else's!)

-As always, take care when using blades to cut sprues, and enjoy using these parts!
Details
What's in the box:
underframe brake sprue 200 HOx2b
Dimensions:
2.77 x 0.9 x 2.99 cm
Switch to inches
1.09 x 0.36 x 1.18 inches
Switch to cm
Success Rate:
First To try.
What's this?
Rating:
Mature audiences only.
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